Brake



, 15' endwith a "2 0 longitu "ik 1g owing Y lever and a modied. form" ofactuatorwgithin n. l.sg-aaa Patented May 30,1933

UNITED ',srA'rEs i BUGm v'. TAYLOR, Ol' CHICAGO, IILIINOIS, ASSIGNOB TOBENDIX BRAKE OOIPANY, Ol' v y SOUTH BEND, A CORPORATION OF ILLINOISBRAKE `Application tiled November 30, 19538. ilrial fo. 322,595.

5 revision of a novel control meansv for the rake comprising, incombination with the usual brake drum, internal expanding shoes andbacking-plate, and a floatin lever preferably mounted for substantiallyuniversal 1o 4movement and adapted to transmit a lineal movement to abrake-o rating plunger.

In one embodiment i ustrated, the lever is supported by a novel fulcrumbracket mounted on the front axle and is provided at'one bp'atula-likecup-sha ed member nestingrwithin the bracket and disconnectedly enga gthe plunger. The lever is so mounte as to be capable of movement in allplanes, dpgssing' through and including the al center line of the leverwhen in released position, is returned to its inoperative ition by aconically shaped spring con 'ed between the fulcrum bracket and 4a. stopon the lever.

as A As a modification of my invention, I may :mount my lever-supportingbracket directly on the brake backing plate or equivalent support and Imay also translate the lineal motion of the actuating plunger into arotary a0 motion of a brake cam. This latter construction ma be embodiedin an internally square thred cam meshing with the corresponding'lythreaded lineally movable plunger, the

' latter to be supported by a carrier racket 85 keyed to the plunger toobviate rotary motion thereof. A The above and otherfeatures of theinvention will be apparent fromithe following de- .scription of theillustrative embodiments shown in the accompanying drawing, in

which: 4

-Figure 1 is a partial vertical section through my novel brake mechanismand assdmpm 1 1F' 1 d isa anvlewo igure ;an F' re 3 is s viewsimilar. toF' Yre 1 Aasmodiierflform of support or the the brake sup rt. in 1, Ihavewegvbodived my invention inthe usualfront wheel con- ,f

struction comprising a steerin knuckle e front axle swivele'd by a kingpin 12 to 14 and supporting the backin plate or equivalent brake support16. 'Ig shown), supported by the s indle,isl rovided with the usualbrake rum 18 w ich encompasses the shoes 20 of an internal expandingtype of brake. i 11%, 1

According to an important feature, of my invention, I provide anovelcontrol oractuator for the brake `which may comprise a he wheel(not.

lever 22 having a semi-spherical cup-shaped enlarged end 24 nestedwithina -two-diametered tubularly shaped bracket 26 having a boss 28 todetachably mount the bracket upon theQend of the axle structurewherebyitis supported in a non-swivellin relation with reslpect to the swivellingdr 18.

conically shaped compression spring 30 is preferably confined between arecess 32 in one end'of the vbracket and a stop-34 pinned to the lever,which spring functions as a return spring for the lever.

The rim of the cup 24 is. preferably enlarged at 36 and is'adaptedtoulcrum at any point about its seat on the bracket support.

In operation, motion of the lever 22, imparted by suitable transmissionlinkageto vthe service pedal, transmits a lineal movement to the.cylindrical sphericalv ended Lplunger 37, the latter journaled in abacking plate bearing 38 and actuating a suitable togle mechanism 40 tooperate the brake shoes.

prefer to so proportion and arrange the several partsof the brake as tomake the point of contact r, Fi re 1, outside the swlveling axis withvthe rake released. With the lever fulcruming on a portion of its* rim,point A is then moved, as indicated by dotted lines in Figure 1,immediately ad acent the swiveling axis with the brake fu y a plied,thus obviatin any impairment of ev steering andprovi in a uniformbraking unaffected bythe swive g movement. y By' virtue of hesubstantially universal movement of the lever'and its no vel ball andsocket connection with the o rating plungeveris insured egeiectiveoperation of the a all. times substantally'unaectedbyrela- 100 tivemovement of the sprung and unsprung parts of the vehicle aecting therelative position of the lever and plunger.

I As disclosed in Figure 3, I may, as an alternative, attach the leverfulcrum bracket 42 directly to the backing plate, the rim of the levercontacting a flange 44 in the interior of the bracket. In allv otherrespects the action is the same as previously indicated. I also suggest,in this modication, a v

novelv cam and plunger mechanism preferably comprising an internallysquare threaded shoe-actuating cam 46 meshing-with a correspondinglyexteriorly threaded plunger 48, the latter splined to a tubular bearing50 secured to the backing plate. Bearing 50 may be connected by a bridgemember 52 to a smaller tubular bearing 54 supporting the end of theplunger.

In operation, translatory movement of the plunger ei'ects a rotarymovement to the cam through the intermediary of its threaded connectiontherewith. With release of the brakin pressure, the return springswithin the rake function to move the plunger back to its inoperativeposition.

While but two embodiments of my invention have been disclosed anddescribed in detail, it is not my intention to limit the scope thereofto such embodiments or otherwise than `\by the terms of the subjoinedclaims.

Iclaim:

1. Mechanism for controlling brakes on the steering wheels of a vehiclecomprising, in combination, a dirigible wheel mounted y upon one end ofan axle and provided with a'brake drum mounted thereon, the latterencompassing an internal expanding brake secured to a brake sup ortswiveling with the wheel, control means or said brake comprisingaforce-multiplying brake-operating de-l vice swiveling with the wheel anda nonswiveling co-operating part movable in all` planes passing throughand including the longitudinal center line of the part when ininoperative position, said non-swiveling part having a point ofengagement with said force-multi lying part movable, in applying "thebra e, substantially in a plane perpendicular to'the swiveling axis from`an idle position spaced vfrom that axis to an active positionsubstantially in that axis.

2. A vehicle having, in combination, a swiveled wheel having a brake,and operating connections for the brake including a forcemultiplyingbrake-operating part swiveling with the w eel and a co-operatingnon-swiveling lever part co-axial with said swiveled part and so mountedas to have a substantially universal vmovementwith respect to saidswiveled part and o erable to move said swiveled part substantia theplane of the wheel.

3. A- vehicle having, in combination, a`

y at right angles to swiveled wheel having a brake and operatingconnections for the brake including a laterally extending part swivelingwith the wheel and a non-swiveling lever member mounted in prolongationwith said swiveled part and operable to move said swiveled partlengthwise to apply the brake.

4. A vehiclehaving, in combination, a swiveled Wheel having a brake andcontrol means forsaid brake comprising, in combination, a laterallydirected plunger part swiveling with the wheel and a non-swiveling leverart co-axial with and disconnectedly engagmg said plunger and soconstructed and arranged as to have a substantial universal movementrelative to said plunger.

with the wheel and including a laterally l movable plunger having aspherically shaped end, in combination with a cup-shaped leverv partdisconnectedly engaging said spherical end and lying in prolongationtherewith in its inoperative position.

7. Mechanism for controlling brakes comprisin, in combination, a brakesupport having a tting therein acting as a bearing for a brake-operatingplunger, a bracket support mounted on one end ofthe front axle and alever member mounted in and supported by said bracket, said lever memberdisconnectedly engaging said plunger and further characteri'zed by beingso constructed andyar'- ranged within said bracket as to besubstantially unaffected by relative movement of the sprung and unsprungparts of the vehicle.

v 8. A brake structure comprisin ,in combination, a brake support plate,a ating laterally movable plunger part vjournaled in said late, to etherwith a lever member having a all-an -socket connection with saidplunger.

9. In a brake mechanism,` a brake'drum,a closure plate therefor,afriction device mounted within said plate and operating means for saidfriction device within said plate comprising a rotatable cam, anonrotatable plunger member so connected to the cam as to effect by atranslatory movement `thereof a rotary movement to said cam, to-

gether witha lever member without said plate effecting said translatorymovement to said plunger.

10. A brake-operating mechanism comprising, in combination, a rotatablecam provided with an internal thread having a meshing engalgement withan externally threaded linea y and non-rotatably movable plunger.

11. A c lindrical plunger member characterized A y an external uarethread 'and rounded at one end thereo in combination with anv operatingdevice in thrust engagement with said end for moving the plunger memberlengthwise, and means meshing with said thread and turned b lengthwisemovement of the plunger member.

12. For use in combination with a vehicle, an axle, a drum swivelled onsaid axle, a backing plate for said drum,I a circularbracket mounted onthe axle, a lever having a cup shaped enlarged head mounted foruniversal movement on the bracket, a plunger journalled in the backinplate and swiveling therewith and contacting with the interior of thecup-shaped end of the lever. l

In testimony whereof, I 4have hereunto signed my name.

EUGENE V. TAYLOR.

